【WPF】RichTextBox复制表情图片，没法获取挂图片的源文件地址

using System;

using System.Text;

using System.IO;

using System.Windows.Forms;

using System.Drawing;

using System.Collections.Generic;



public class RichTextEx : RichTextBox

{

    public RichTextEx()

    {

    }



    protected override void WndProc(ref Message m)

    {

        if (m.Msg == 0x0007)

        {

            foreach (Control _SubControl in base.Controls)

            {

                _SubControl.Tag = "1";

            }



            GetRichTextObjRectangle();



            for (int i = 0; i != base.Controls.Count; i++)

            {

                if (base.Controls[i].Tag.ToString() == "1")

                {

                    base.Controls.RemoveAt(i);

                    i--;

                }

            }

        }

        base.WndProc(ref m);

    }



    public class ImageStruct

    {

        public Point Img_Point;

        public int Img_Location;

        public Bitmap Img;



        public ImageStruct(Point _point, int _location, Bitmap _img)

        {

            Img_Point = _point;

            Img_Location = _location;

            Img = _img;

        }

    }

    public List<ImageStruct> ImageList = new List<ImageStruct>();





    public class ContentStruct

    {

        public Point Content_Point;

        public string Content_Text;



        public ContentStruct(Point _point, string _text)

        {

            Content_Point = _point;

            Content_Text = _text;

        }

    }

    public List<ContentStruct> ContentList = new List<ContentStruct>();



    private Bitmap _bmp = new Bitmap(96, 96);



    /*

    protected override CreateParams CreateParams

    {

        get

        {

            CreateParams cp = base.CreateParams;

            cp.ExStyle |= 0x20;

            return cp;

        }

    }

    */



    public void AddFile(string p_FileFullPath)

    {

        byte[] _FileBytes = File.ReadAllBytes(p_FileFullPath);

        Image _Image = Image.FromStream(new MemoryStream(_FileBytes));

        string _Guid = BitConverter.ToString(Guid.NewGuid().ToByteArray()).Replace("-", "");

        StringBuilder _RtfText = new StringBuilder(@"{\rtf1\ansi\ansicpg936\deff0\deflang1033\deflangfe2052{\fonttbl{\f0\fnil\fcharset134 \'cb\'ce\'cc\'e5;}}\uc1\pard\lang2052\f0\fs18{\object\objemb{\*\objclass Paint.Picture}");

        int _Width = _Image.Width * 15;

        int _Height = _Image.Height * 15;

        _RtfText.Append(@"\objw" + _Width.ToString() + @"\objh" + _Height.ToString());

        _RtfText.AppendLine(@"{\*\objdata");

        _RtfText.AppendLine(@"010500000200000007000000504272757368000000000000000000" + BitConverter.ToString(BitConverter.GetBytes(_FileBytes.Length + 20)).Replace("-", ""));

        _RtfText.Append("7A676B65" + _Guid);          

        _RtfText.AppendLine(BitConverter.ToString(_FileBytes).Replace("-", ""));

        _RtfText.AppendLine(@"0105000000000000}{\result{\pict\wmetafile0}}}}");

        base.SelectedRtf = _RtfText.ToString();

    }



    private void PointFile(string p_Rtf, Point p_StarPoint, int p_Width, int p_Height)

    {

        int _Index = p_Rtf.IndexOf(@"{\*\objdata");

        if (_Index == -1) return;

        _Index += 80;

        string _LengthText = p_Rtf.Substring(_Index, 8);



        int _Length = BitConverter.ToInt32(new byte[] { Convert.ToByte(_LengthText.Substring(0, 2), 16), Convert.ToByte(_LengthText.Substring(2, 2), 16), Convert.ToByte(_LengthText.Substring(4, 2), 16), Convert.ToByte(_LengthText.Substring(6, 2), 16) }, 0);

        _Index += 10;



        string _Head = p_Rtf.Substring(_Index, 8);

        if (_Head.ToUpper() != "7A676B65") return;

        _Index += 8;



        string _Guid = p_Rtf.Substring(_Index, 32);



        Control _Controls = base.Controls[_Guid];

        if (_Controls == null)

        {

            PictureBox _PictureBox = new PictureBox();

            _PictureBox.Name = _Guid;

            _PictureBox.Tag = "0";

            _PictureBox.Location = p_StarPoint;

            _PictureBox.Size = new Size(p_Width, p_Height);



            _Index += 32;

            _Length -= 20;



            _PictureBox.Image = Image.FromStream(LoadMemoryStream(p_Rtf, ref _Index, _Length));



            _bmp = _PictureBox.Image as Bitmap;

            base.Controls.Add(_PictureBox);

        }

        else

        {

            _Controls.Location = p_StarPoint;

            _Controls.Size = new Size(p_Width, p_Height);

            _Controls.Tag = "0";

        }

    }



    private MemoryStream LoadMemoryStream(string p_Text, ref int p_Index, int p_Count)

    {

        MemoryStream _File = new MemoryStream();

        char[] _Text = p_Text.ToCharArray();

        for (int i = 0; i != p_Count; i++)

        {

            if (_Text[p_Index] == '\r' && _Text[p_Index + 1] == '\n')

            {

                i--;

            }

            else

            {

                _File.WriteByte(Convert.ToByte(_Text[p_Index].ToString() + _Text[p_Index + 1].ToString(), 16));

            }

            p_Index += 2;

        }

        return _File;

    }



    private void GetRichTextObjRectangle()

    {

        ImageList.Clear();

        ContentList.Clear();



        RichTextBox _RichText = new RichTextBox();

        _RichText.Rtf = base.Rtf;

        int _Count = base.Text.Length;



        for (int i = 0; i != _Count; i++)

        {

            if (base.Text[i] == ' ')

            {

                _RichText.Select(i, 1);



                if (_RichText.SelectionType.ToString() == "Object")

                {

                    Point _StarPoint = base.GetPositionFromCharIndex(i);



                    System.Text.RegularExpressions.Regex _RegexWidth = new System.Text.RegularExpressions.Regex(@"(?<=\\objw)[^\\]+");

                    System.Text.RegularExpressions.Regex _RegexHeight = new System.Text.RegularExpressions.Regex(@"(?<=\\objh)[^{]+");



                    int _Width = 0;

                    int _Height = 0;



                    if (int.TryParse(_RegexWidth.Match(_RichText.SelectedRtf).Value, out _Width) && int.TryParse(_RegexHeight.Match(_RichText.SelectedRtf).Value, out _Height))

                    {

                        _Width = _Width / 15;

                        _Height = _Height / 15;

                        PointFile(_RichText.SelectedRtf, _StarPoint, _Width, _Height);



                        ImageList.Add(new ImageStruct(_StarPoint, i, _bmp));

                    }

                }

                else

                {

                    Point _StarPoint = base.GetPositionFromCharIndex(i);

                    ContentList.Add(new ContentStruct(_StarPoint, _RichText.SelectedText));

                }

            }

            else

            {

                _RichText.Select(i, 1);

                Point _StarPoint = base.GetPositionFromCharIndex(i);

                ContentList.Add(new ContentStruct(_StarPoint, _RichText.SelectedText));

            }

        }



        _RichText.Dispose();

    }



    public void updata()

    {

        foreach (Control _SubControl in base.Controls)

        {

            _SubControl.Tag = "1";

        }



        GetRichTextObjRectangle();



        for (int i = 0; i != base.Controls.Count; i++)

        {

            if (base.Controls[i].Tag.ToString() == "1")

            {

                base.Controls.RemoveAt(i);

                i--;

            }

        }



    }

}

// 添加一副图像

        private void button2_Click(object sender, EventArgs e)

        {

            Rich.AddFile("face.png");

        }